Results 11 to 20 of about 11,564,246 (232)

Remote sensing and its applications using GNSS reflected signals: advances and prospects

open access: yesSatellite Navigation
The Global Navigation Satellite Systems (GNSS), including the US’s GPS, China’s BDS, the European Union’s Galileo, and Russia’s GLONASS, offer real-time, all-weather, any-time, anywhere and high precision observations by transmitting L band signals ...
Shuanggen Jin   +13 more
doaj   +2 more sources

Design of a Compact High Isolation 4-Element Wideband Patch Antenna Array for GNSS Applications

open access: yesIEEE Access, 2022
This work presents a compact (125 mm diameter) wideband four-element antenna array with a high isolation level for Global Navigation Satellite System (GNSS) anti-jamming applications.
Muhammad Awais, A. Madni, W. Khan
semanticscholar   +1 more source

A Travelling-Wave-Fed Slot Spiral Antenna With Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
A travelling-wave-fed slot spiral antenna with wide axial-ratio (AR) bandwidth and beamwidth for GNSS applications is proposed in this paper. The evolution procedure of the proposed antenna can be classified into three steps. Firstly, 12 identical spiral
Z. Zhong, Xiao Zhang
semanticscholar   +1 more source

Cover crops affect soybean yield components, but not grain quality

open access: yesAgronomy Journal, Volume 114, Issue 6, Page 3193-3205, November/December 2022., 2022
Abstract Cover cropping is mainly used to prevent soil erosion, but the effects of individual cover crops on the subsequent soybean [Glycine max (L.) Merr.] are hardly known. Therefore, two annual field trials with 15 cover crop species and bare fallow as control were conducted in semi‐arid East Austria in 2016 and 2017.
Pia Euteneuer   +6 more
wiley   +1 more source

A Comprehensive Review of GNSS/INS Integration Techniques for Land and Air Vehicle Applications

open access: yesApplied Sciences, 2023
Navigation systems are of interest for applications in both civilian and military vehicles. Satellite navigation systems and inertial navigation systems are the most applied in this area.
Nurlan Boguspayev   +4 more
semanticscholar   +1 more source

Functional traits of riparian trees in the lower Fitzroy River, Western Australia

open access: yesEcohydrology, Volume 16, Issue 1, January 2023., 2023
Abstract Riparian trees are critically important for maintaining the ecological function of freshwater ecosystems. Globally, anthropogenic changes to water regimes are impacting the health and distribution of riparian trees. Understanding the physiological constraints on the distribution of riparian tree species in relation to the water regime is ...
Caroline A. Canham   +6 more
wiley   +1 more source

Topographic thresholds for gully head formation in badlands

open access: yesEarth Surface Processes and Landforms, Volume 47, Issue 15, Page 3558-3587, December 2022., 2022
Gully topographic threshold model was extended to badlands, on the basis of data collected in the Mediterranean environment in Italy and Spain, characterized by diversified climatic, lithological, geological and anthropogenic settings. Criteria for the attribution of curve number values has been more objectively defined in order to reduce arbitrariness
Mauro Rossi   +4 more
wiley   +1 more source

Comparing different machine‐learning techniques to date Nile Delta sediments based on portable X‐ray fluorescence data

open access: yesGeoarchaeology, Volume 38, Issue 1, Page 57-75, January/February 2023., 2023
Abstract Geomorphology generally aims to describe and investigate the processes that lead to the formation of landscapes, while geochronology is needed to detect their timing and duration. Due to restrictions on exporting geological samples from Egypt, modern geoscientific studies in the Nile Delta lack the possibility of dating the investigated ...
Martin Seeliger   +5 more
wiley   +1 more source

A multirobot system for autonomous deployment and recovery of a blade crawler for operations and maintenance of offshore wind turbine blades

open access: yesJournal of Field Robotics, Volume 40, Issue 1, Page 73-93, January 2023., 2023
Abstract Offshore wind farms will play a vital role in the global ambition of net zero energy generation. Future offshore wind farms will be larger and further from the coast, meaning that traditional human‐based operations and maintenance approaches will become infeasible due to safety, cost, and skills shortages.
Zhengyi Jiang   +7 more
wiley   +1 more source

A Novel UAV-Assisted Positioning System for GNSS-Denied Environments

open access: yesRemote Sensing, 2020
Global Navigation Satellite Systems (GNSS) are extensively used for location-based services, civil and military applications, precise time reference, atmosphere sensing, and other applications. In surveying and mapping applications, GNSS provides precise
Panagiotis Partsinevelos   +3 more
doaj   +1 more source

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